A comparison of dimensional standard of several nickel-titanium rotary files
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Objectives: The aim of this study was to compare the dimensional standard of severalnickel-titanium (Ni-Ti) rotary files and verify the size conformity. Materials andMethods: ProFile (Dentsply Maillefer), RaCe (FKG Dentaire), and TF file (SybronEndo)#25 with a 0.04 and 0.06 taper were investigated, with 10 in each group for a totalof 60 files. Digital images of Ni-Ti files were captured under light microscope (SZX16,Olympus) at 32×. Taper and diameter at D1 to D16 of each files were calculated digitallywith AnalySIS TS Materials (OLYMPUS Soft Imaging Solutions). Differences in taper,the diameter of each level (D1 to D16) at 1 mm interval from (ANSI/ADA) specificationNo. 101 were statistically analyzed using one-way ANOVA and Scheffe’s post–hoc testat 95% confidence level. Results: TF was the only group not conform to the nominaltaper in both tapers (p < 0.05). All groups except 0.06 taper ProFile showed significantdifference from the nominal diameter (p < 0.05). Conclusions: Actual size of Ni-Ti file,especially TF, was different from the manufacturer’s statements.
Abstract
Objectives: The aim of this study was to compare the dimensional standard of severalnickel-titanium (Ni-Ti) rotary files and verify the size conformity. Materials andMethods: ProFile (Dentsply Maillefer), RaCe (FKG Dentaire), and TF file (SybronEndo)#25 with a 0.04 and 0.06 taper were investigated, with 10 in each group for a totalof 60 files. Digital images of Ni-Ti files were captured under light microscope (SZX16,Olympus) at 32×. Taper and diameter at D1 to D16 of each files were calculated digitallywith AnalySIS TS Materials (OLYMPUS Soft Imaging Solutions). Differences in taper,the diameter of each level (D1 to D16) at 1 mm interval from (ANSI/ADA) specificationNo. 101 were statistically analyzed using one-way ANOVA and Scheffe’s post–hoc testat 95% confidence level. Results: TF was the only group not conform to the nominaltaper in both tapers (p < 0.05). All groups except 0.06 taper ProFile showed significantdifference from the nominal diameter (p < 0.05). Conclusions: Actual size of Ni-Ti file,especially TF, was different from the manufacturer’s statements.
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